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习题练习:Impulse and momentum



 作者: admin发布日期: 2024-08-07 16:03   总分: 17分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 15:54  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.16: A car of mass m, trav*lmwll9h4m1gmo+m a2 eling at speed v, stops in time t when maximum braking force is applied. Assuming the braking force is independent of mass, what time would be required to stop a car ofm9ml m l4h+lw1o2mg* a mass 2m traveling at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the veloc*sw n a0tbpl.2dbj u:*ity of a moving object is doubled, its_______is also doubled.udb: tn.w2 j*a0sb*lp

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fneux1yjd:l* m x(t $\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the following choices is most closely assop lqa ec+6cli30; r;*d9zua tzciated with the following observation about an isolated object: “The linear momentum of the object is c3r9l * c+uzpeidctq; ;0a6zalonstant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change in linear momentum of an object is alwake7q x:- ynb)iys in the same direction7x:yk)b ien -q as the

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N.a3rzlojn: ( e net force act to produce a change in momentum of 200j nrae.o 3:(lz kg.m/s?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have the same momentum. Q can have more kinetic energ,6x h-; hjmx(jwlf1u wkb(b/ gsk8c (uy than P if it:hb;(jh 1wx(x-6 8cm g,lus(ujkwkf / b

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass of 0.50 kg and a speed of )b,tje8 ow.5l vz7xc o6.0 m/s collides perpendicularly with a wall and bouncelx8v,o 57.w)cjetzo b s off with a speed of 4.0 m/s in the opposite direction. What is the magnitude of the impulse acting on the ball?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls +k92o+e, hgg*m rsuhq freely from a height of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed ko he q *+hu2rs9g,m+gat which she first struck the trampoline. What is the average force the trampoline applies on the gymnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg mass befo 2 jscq,5jibin ity0(97+moves at 10.0 m/s when it has a collision in space. The mass’s speed was unchanged, but the direction of its velocity was altej72+tcyoq5( s0jb if,9e bniired by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat striking a 0.125 kg-bu+18ycmv 1.,owj db fhaseball is in contact with the ball for a time of 0.03 seconds. The ball travels in a straight line as ywj,m+c1vfuho d.b81 it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average force acting on the ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0 g has atotal kinetic energy ovaf nc ns2 b)voay 4*p)+u+sh70o8chl f 100.0 J and an x-component of linear momentum equal to 24.0 kg.m/s. The object is moving in the x-y plane. What is they-component of the objpsa y2nfc+vh 4lh+)7)oubnv8s*cao 0ect’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time t, a pointkcb ft 7l)0-yi object of mass M moves with velocity V, has acceleration a, and is at position (x,y). In what di7tk0 y-cfbli )rection must the linear momentum of the object be directed at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball of mass 2.0 kg falling straight downward hits;t j*70np ;nauwna*-t 8qoqd o the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the 0n t o7p8unwj-qatdq;; a*on* ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg fallin0m3a)n.hf+: -imt rlm0vqzgi g straight downward hits the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The c.qr0mfl+ -im i:)t3z 0vmgnah ollision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is being pushed to the right across a horizontal sur3hb58rauv e*y face e3b ar8v5hy*uwhile a constant frictional force of 8.0 N acts on the box. At some instant of time, the box has a speed of 4.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 12.0 kg is being pushed to the right across a horizonbma7vgjcks+;dy-/ ty5 s ra41tal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net force acts on it. Which one of the following choices bebst7-jkgyvm 5 aday csr/1; +4st represents the magnitude of the linear momentum of the box at this instant?

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